Chargers sign Broncos DL Mitch Unrein

The Chargers have signed away a backup defensive lineman from a division rival. San Diego has inked a two-year deal with Denver’s Mitch Unrein, the club said Wednesday. The 27-year-old Unrein appeared in eight games as a reserve in 2014, notching one tackle. Overall, he played in 54 regular season contests in the last four…